Methadone is a long-acting opioid medication that is used to reduce withdrawal symptoms in people addicted to heroin or other narcotic drugs, and it can also be used as a pain reliever. When methadone is used for Opioid Use Disorder, it reduces withdrawal symptoms and drug cravings, but does not cause the "high" associated with drug addiction. Methadone pills are highly regulated medications, and when used for OUD, are only available through approved opioid treatment programs that involve regular monitoring, counseling, and drug testing to make sure that patients are making progress in their recovery. When Methadone online is used for pain, it should only be used for pain that is severe enough to require daily, around-the-clock, long-term opioid treatment when no other treatment options have helped adequately. This medicine is not for use on an as-needed basis for pain. Methadone works by activating the opioid receptors in the brain and nervous system. It is usually taken orally as a liquid or tablet.